Terry Collins writes:
John Savage wrote:

Making a good reason for having a gravity-fed tap in the tank in addition
to the popular electric pressure pump. In the event of a bushfire, loss
of electricity could make the water inaccessible unless you have a tap
already fitted to the tank.

What would you do with it?
Exactly what fire authorities currently recommend. But in the worst
imaginable situation, you'd need to soak your clothing.

I don't fancy playing bucket tag with an approaching fire.
If you were to play silly buggers you'd be asking to be roasted.

The $64,000 question to me is "how much water do you need to make have
any effect?"
Half a cupful should be plenty, provided you get to that glowing cinder
before it ignites any timber of your house.

How long/how much water does it take to soak surrounding vegetation?
None, because being the sensible homeowner, you have already cleared
all flammable surrounding vegetation that could pose a danger. There
is nothing left to to be "soaked". Yes, even your precious mulch has
all been raked off and transported well away.
--
John Savage (news address invalid; keep news replies in newsgroup)